Exploring Percent Change Concepts

The video tutorial covers the concept of percent change, explaining how to calculate it using a formula that involves the change divided by the original value. It provides multiple examples, including price changes in milk, pizza, popcorn, and more, to illustrate both percent increases and decreases. The tutorial also compares percent decreases between different items and calculates changes in student enrollment, water bills, PTA membership, and salary raises.

What does percent change describe?

• The future value of an item

• The change in value over time, either an increase or a decrease

• The total value of an item

• The original value of an item

In the percent change formula, what is divided by the original value?

• The new value

• The total value

• The percent

• The change

If a gallon of milk cost $2.79 in 2000 and $3.98 in 2020, what is the percent increase?

• 29.9%

• 50.3%

• 42.7%

• 35.6%

A frozen pizza cost $3.00 in 2000 and $2.50 in 2020. What is the percent decrease?

• 16.7%

• 20.5%

• 25.0%

• 33.3%

Which device had the greatest percent decrease: a DVD player marked down from $150 to $100, or a video game console with a 15% price drop?

• DVD player

• Video game console

• Both had the same percent decrease

• Neither had a percent decrease

A sweater is marked down from $25 to $19. What is the percent change?

• 24% increase

• 24% decrease

• 20% increase

• 20% decrease

If the seventh grade class had 280 students last year and experienced a 15% decrease, how many students are enrolled this year?

• 42

• 238

• 280

• 242

Randall's water bill increased from $78 in May to $136.50 in July. What is the percent increase?

• 50%

• 75%

• 100%

• 25%

If PTA membership increased by 35% from 160 members, how many members are there now?

• 200

• 216

• 176

• 240

Eugene earns $2700 monthly and receives a 3.5% raise. Will his new salary be more than $2800?

• No, it will be $2750

• Yes, it will be $2800.50

• No, it will be $2794.50

• Yes, it will be $2900